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(No Model.) 3 Sheets-Sheet 1;

J. P. H'ANSON.

ORE GRUSHBR.

No. 583,619. Patented June 1, 1897.

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(No Model.) 3 Sheets-Sheet 2.

J. P. HANSO'N. om: GRUSHBB.

No. 583,619. Patented June 1,1897.

(No Model.) 3 Sheets-Sheet 3,

J. P. HANSON.

A011B CRUSHER. y

Patented June 1,1897.

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UNITED STATES PATENT ErrcE.

JOHN P. nANsoN, or RU'r'rE, MONTANA, AssIGNOR or ONE-HALE rro ABRAM T.KERR, OE BUFFALO, NEW YORK, AND JAMES n. EERR, or HELENA,

MONTANA.

ORE-CRUSHER SPECIFICATION formingpart of Letters Patent No. 583,619,dated June 1, 1897.

Application filed July 27, 1896. Serial No. 600,618. (No model.)

To all whom t may concern:

Beit known that I, JOHN P. HANSON, a subject of the King of Sweden andNorway, residing at Butte, in the county of Silver Bow and State ofMontana, have invented a new and useful Improvement in Ore-Crushers,ofwhich the following is a specification.

This invention relates to the general class of ore-crushers commonlyknown as Chilian mills,7 and more particularly t0 a combined ore crusherand amalgamator which is especially adapted to free milling and thereduction of semirefractory ores. The invention has more especialreference to mills of this class in which the rollers are arranged in aninclined position and run upon a bed sloping toward the axis of themachine, so that the pressure resulting from centrifugal force isutilized in addition to that exerted by the weight of the rollers.

My invention has for its objects to increase the strength of the head ordriver which carries the crushing-rollers and to relieve the same fromthe wear resulting from its vertical movement; to render eachcrushing-roller vertically movable independently ofthe other rollers, sothat it can yield to unusually hard substances without affecting theremaining rollers, and at the same time to hold the rollers in contactwith the dies or annular bed of the frame, so as to prevent bounding ofthe rollers in passing over such obstructions, and also to so constructthe dies and so support the crushing-rollers that the contiguoussurfaces of the dies and rollers are Worn at a uniform. angle.

Another object of my invention is to provide the machine with meanswhereby the mercury employed for gathering or amalgamating the liberatedmetal is prevented from entering between the crushing-rollers and thedies, so as to avoid f flouring of the amalgam Y and the objectionsresulting therefrom..

Additional objects of the invention are to improve the construction ofthe Scrapers which distribute and discharge the material, and to providethe machine with efficient lubricating means whereby oil is convenientlysupplied to the various bearings, but at the same time excluded from theore in the pan.

In the accompanying drawings, consisting of three sheets, Figure l is asectional elevation of my improved ore-crusher. Fig. 2 is a horizontalsection thereof in line 2 2, Fig. l. Fig. 3 is a top plan View of thesame with the casing and a portion of the lubricating devices removed.Fig. At is a transverse section of the bearing of one of thecrushing-rollers in line et 4, Fig. l. Fig. 5 is a top plan view of themachine with the casing, the crushingrollers, the driving-head, and anumber of the dies removed to expose the mercurygrooves of the pan. A

Like letters of reference refer to like parts in the several figures.

A is the pan or trough of the machine, supported upon timbers A', A2,the hardened dies or sectional steel bed forming the bottom of the pan;B, the usual annular rim or screen-frame surrounding the pan, and B thescreens arranged in said frame in a wellknown manner.

B2 is the usual feed-spout, arranged on one side of the machine, and Bsthe dischargespout, arranged on the opposite side thereof, as shown inFigs'. 3 and 5.

C is a stationary vertical shaft or arbor arranged axially in themachine and secured at its lower end to a spider or bridge-tree D,preferably cast in one piece with the pan.

E is an upright rotary hub surrounding the arbor C and preferablyprovided with tapering roller-bearings to reduce friction. In theconstruction shown in the drawings a lower annular row of taperingrollers f is interposed between the lower end of the hub and theopposing upper end of a cylindrical boss f' of the spider D, and anupper row of tapering rollers f2 is arranged in a conical recess in theupper end of the hub between the wall of said recess and a groovedconical collar f3, applied to the reduced upper end of the arbor C.

G is a head or driver which is mounted on the rotary hub E, so as toturn therewith, and which carries the crushing-rollers H, so as to causethe latter to revolve about the arbor C and traverse the pan. Thisdriver, while compelled to rotate with the hub E, is free to slidevertically thereon to permit the rollers to descend as they become worn.For this purpose the driver is preferably made ICO three-sided andconnected with the hub by means of removable upright pins or keys i,each of which is arranged partly in a recess formed in the bore of thedriver and partly in a recess formed in the surface of the hub, as shownin Figs. l and 2.` These pins rest at their lower ends upon a flange j,formed at the lower end of the hub, and are confined in place by a capor ,plate j', applied to the contracted upper end of the arbor C andoverlapping the upper ends of the pins. The cap j' is secured in placeby a collar jg, having a set-screw. The pins or keys i' receive the weardue to the driving strain between the rotary hub E and the driver G andwhen worn out can be renewed at small cost, thereby relieving' the huband driver from such wear and avoiding the necessity of renewing theseparts, which would involve considerable expense. The pins are readilywithdrawn upon removing the collarj2 and cap j'. This cap is as small asor smaller than the upper end of the hub, so that the driver may belifted ott the hub for cleaning the mill or for other purposes withoutremoving the cap.

K is a gear-rim secured to or formed integrally with the flange j of thehub, and K is the main driving-shaft ot' the machine, arrangedhorizontally underneath the pan and having a pinion 7c, which mesheswith the gear-rim K. The d riving-shaft K is supported in bearings k k2and is provided with a driving-pulley 7a3. 13 y mounting the driver Gupon a separate rotary hub, instead of securing the saine directly to anupright driving-shaft, a stronger construction is obtained, whicheffectually withstands the great strains to which it is subjected.

Each of the crushing-rollers is rigidly secured to a shaft or axle 7L,preferably inclined toward the arbor C and journaled in a bearing-boxH', carried by the rotary driver G, rollers h being preferably arrangedbetween the shaft of the roller and the bearing-box, as shown, to reducefriction to a minimum. In order to allow the crushing-rollers tooscillate vertically on the driver to enable them to rise and ride overunusually hard obstructions, the bearing of each roller is embraced by atransverse yoke h2, having horizontal trunnions h3, which turn inbearings h4, Secured to the upper side of the driver on opposite sidesof the main bearing-box Il', as shown in Figs. 3 and 4. These mainbearingboXes are seated in recesses H2, formedin the driver, as shown inFig. 4.

Under each bearing-box H/ and on the inner side of its trunnions h3 isarranged a spring h5, preferably consisting of a rubber block, whichprojects above the bottom of the recess in which the box is seated andwhich constantly tends to swing the inner end of the box upwardly,thereby depressing` its front portion and the roller-shaft mountedtherein and at all times holding the roller in yielding contact with thepan-dies or the ore lying upon the dies. The springs h5, while allowingthe crushing-rollers to rise independently of one another, always tendto force the same downward, thereby preventing the rollers from boundingor leaving the dies and avoiding the consequent loss in the crushingcapacity of the machine.

The upper or working surface of the dies A2 is inclined inwardly ortoward the axis of the machine, and the periphery of thecrushing-rollers is parallel with their axis and as wide as thev diesand so that the inclined rollers run squarely upon the inclined face ofthe dies. The inner and outer edges of the dies are perpendicular orparallel with the vertical arbor C of the machine, as shown in Fig. l.This construction of the dies, in conjunction with thevertically-sliding capacity of the driver G and the oscillatory featureof the crushing-rollers, causes the contiguous faces of the rollers anddies to Wear at a uniform angle and without forming recesses or flangeson the parts, this uniform wear being due to the above-describedconstruction of the dies and the fact that the vertically-sliding driverand the vertically-swinging rollers maintain the same relative positionsat all elevations of the rollers.

L is a groove or gutter arranged in the bottom of the pan or trough A,preferably at the inner edge of the annular steel bed formed by the diesA2, and extending entirely around the pan. This annular groove isadapted to contain mercury and to receive the particles of gold or othermetal which are liberated from the ore. The pan is preferablyprovided inits bottom, underneath the dies, with radial grooves or conduits Z,which lead from the outer wall of the pan to the mercurygroove L andconduct any metal falling over the outer edges of the dies into themercurygroove. From this groove the amalgamated metal is drawn from timeto time by a drainpipe m10, having a valve m11.

M represents the scrapers and conveyers which traverse the dies A2 fordistributing the material over the same and discharging it therefrom.Each of these Scrapers consisis of a blade or shovel having anupwardlyextending shank or screw-stem m, which is carried by an arm m,secured to the driver G and overhanging the pan. The screw-stem of thescraper passes through a smooth or unthreaded opening m2 of thecarrying-arm m and is firmly secured against vertical displacementtherein by clamping-nuts m3, applied to said screw-stein and bearingagainst opposite sides of the arm, as shown in Fig. l. The stein of eachscraper is provided on one side thereof with a stop-rod m4, arrangedparallel therewith and passing loosely through an opening formed in thecarrying-arm m', the stop-rod being connected at its lower end with thescraper-stem by an angular portion m5. This stop-rod prevents thescraper from twisting on the carrying-arm, and at the same time permitsthe stern of the scraper to beadjusted vertically in the arm for raisingor low- IOC lIo

ering the scraper in accordance with the po sition of thecrushing-rollers. This adjustment is effected by screwing one of thenuts m3 upward and the other downward, according to the direction inwhich the scraper is to be adjusted.

In order to permit the scraper to be adj usted lat a greater or lessangle, as well as inwardly and descend in such close contact with the,

dies as to be broken off by striking the meeting edges thereof.

N represents the main water-supply pipe, and n the usual branchesleading from said pipe to the pan or trough A.

O represents the usual casin g surmounting the screen-frame B andpreferably provided with doors o'.

P is an oil-reservoir from which the various moving parts of the machineare supplied and which is supported centrally in the casing directlyover the arbor C by downwardly-diverging oil-pipes p, leading from thebottom of the oil-reservoir to the bearing-boxes II of the threecrushing-rollers, respectively. These pipes enter the upper sides of theine clined bearing-boxes at their outer elevated ends, so that theincoming oil Hows from the outer toward the inner end of each bearing,and thus traverses all parts thereof. Each of these boxes is provided atits inner end on its lower side with outlet-passages q, through whichthe oil escapes into the recess H2, in which the box is seated.

q represents descending oil-passages which extend radially from theinner corners of the recess H2 to the bore of the driver G, as shown inFigs. l and 2, and through which the oil flows from said recess into thespace between the driver and the hub E and into the recesses in whichthe pins or keys i are seated, thereby lubricating thevertically-sliding driver. The oil the'n iiows down the surface of thehub and drips upon the ground or into a suitable receptacle.

r is an oil-passage leading downwardly from the upper end of the arbor Cand thence laterally to the periphery thereof, whereby the oilintroduced into said passage is conducted to the upper roller-bearing ofthe hub E. The passage r is supplied by an upright pipe r from astationary oil-cup R, which latter is in turn supplied from the mainoil-reservoir P by a depending pipe r2. The oil-cup R is supported atthe upper end of the pipe r.

The hub E is separated from the arbor O by an intervening annular spaces, which forms a descending oil-passage through which the oil flows fromthe upper to the lower rollerbearing of the hub.

t is an oil bath or chamber arranged at the inner end of the innerbearing 7a2 of the main driving-shaft K', the inner end of the latterbeing submerged in this bath, so as to lubricate the adjacent bearing.Oil is supplied to this bath or chamber by a descending passage t',leadingfrorn the outer end of the lowerhubbearing to said chamber.

By supporting the main oil-reservoir axially in the upper portion of themachine, the same, although rotated with the driver through its supporting-pi pes, does not revolve in the casing, but simply rotates onits own axis, thus always remaining in the center of the machine, whereit can be readily supplied throughl an opening u in the top of thecasing O without requiring the machine to be stopped for this purpose.

Vis an open-ended conical hood depending from the head of the casing Oand inclosing the space above the driver G and inside of thecrushing-rollers. This hood forms a guard which prevents a carelessattendant from dropping oil into the pan or upon the rollers andincurring the loss of metal which results from the presence of oil inthe pan, and it also prevents the pulp adhering to the periphery of thecrushing-rollers from spattering the bearing-boxes of the rollers.

I claim as my inventionl. The combination with the pan, of an uprightstationary shaft or arbor secured centrally to the pan, a hub capable ofturning on said arbor, but held against vertical movement thereon, meansfor rotating said hub, a driving-head capable of sliding vertically onsaid hub but held against turning thereon, and crushing-rollers runningin said pan and journaled on said head, substantially as set forth.

2. In an ore-Crusher having an annular pan vand crushing-rollers runningin said pan, the

combination with an upright shaft supported centrally on the pan, anon-tapering hub journaled on said shaft, a roller-carrying head capableof sliding vertically on said hub and having a corresponding bore, andnon-tapering pins or keys interposed between said hub and said head andinterlocking with bot-h of said parts, substantially as set forth.

3. In an ore-erusher having an annular pan and crushing-rollers runningin said pan, the combination with an upright shaft supported centrallyon the pan, a non-tapering hub journaled on said shaft, aroller-carrying head capable of sliding vertically on said hub andhaving a corresponding bore, non-tapering pins or keys interposedbetween said hub and said head and interlocking with bothof said parts,a retaining-cap applied to the upper portion o f said shaft andoverlapping the upper ends of said pins or keys but constructed ofsmaller dimensions than the bore of said driving-head whereby the headcan be removed from said hub without disturbing said cap and keys,substantially as set forth.

4. The combination with the pan having a IOO IIO

bed or annular series of dies provided with vertical inner and outeredges and an inclined upper surface which slopes toward the axis of thepan and extends from the outer to the inner edge of the dies, of arotary driving head or carrier capable of moving freely up and down,crushing-rollers having their pe riphery arranged parallel with theiraxis and running upon the sloping faces of said dies, and shaftscarrying said rollers and capable of oscillating vertically on said heador carrier, substantially as set forth.

5. The combination with the pan and the crushing-rollers, of an uprightrotary hub, a driving-head arranged to slide vertically on said hub andCarrying bearing-boxes in which the shafts of the crushing-rollers arejournaled, each of said bearing-boxes being provided at its outer endWith an oil-inlet and at its inner end with an oiloutlet andoil-passages arranged in said driving-head and leading from saidoil-outlets to the bore of said driving-head, substantially as setforth.

6. The combination with the pan and the crushing-rollers of an uprightstationaryr shaft or arbor supported centrally on the pan and a hubsurrounding said arbor, having bearings at its upper and lower ends andseparated from the arbor by an intervening oilpassage which connectssaid upper and lower bearings, said arbor having an oil-passage leadingfrom the upper end thereof to said upper bearing, substantially as setforth.

7. The combination with the pan and the crushing-rollers, of an uprightstationary shaft or arbor supported Centrally on the pan, a hubsurrounding said arbor, having bearings at its upper and lower ends andseparated from the arbor by an intervening oilpassage which connectssaid upper and lower bearings, a stationary oil-cup connected with saidupper bearing, a driving-head mounted on said hub and carryingbearing-boxes in which the shafts of said crushing-rollers arejournaled, and an oil-reservoir arranged axially above said arbor andsupported by oilpipes leading to the several bearing-boxes and having adischarge-pipe leading to said stationary oilcup, substantially as setforth.

Vitness my hand this 16th day of July, 1896.

JOHN P. I-IANSON.

Vitnesses:

CARL F. GEYER, KATHRYN ELMORE,

